Feeding device for the boilers of locomotives



Aug. 2, 1932. L. FRIEDMANN ET AL 1,869,473

FEEDING DEVICE FOR THE BOILERS 0F LOCOMOTIVES Filed Feb. 28. 1929 Patented Aug. 2, 1932 UNETED. STATES PATENT OFFICE LOUIS FRIEDMANN AND HANS .lDEUTSGH, OF VIENNA, AUSTRIA, ASSIGNORS "F0 FIRM ALEX FRIEDMANN, on VIENNA, AUSTRIA FEEDING 'nnvIoE Fort-unis BOILERS on LOCOMOTIVES Application filed February 28, 1929, Serial No. 343,416, and in Austria March 7, 1928.

Our invention relates to a boiler feeding devicefor locomotives of thetype comprising a hot water tank or container to be filled with water which may be set into communication with the steam space of the boiler, whereby the water in the tank or container may be emptied into the boiler under the pressure .of the live steam of the boiler.

According to our invention and in .contrae distinction to similar arrangements hitherto known said tank or containercis filled with water by means of aninjector-operatingwith live steam and with exhaust steam: the live steam of boiler pressure withinthe'oontainer being fed to the live steamnozzle of the injector as long. as such live steamis still present while the exhaust steamflowing from the exhaust steam pipe of the locomotive Will be led tothe exhaust steam'nozzle of the injector. When the supply of live steamwithin the-hot water tank or container is-exhausted'the injector will continue to work with exhaust steam alone and this 'ispossible without difficulty on account of the fact that during the decrease and final exhaustion of thelivesteam supply within said tank orcontainer'also the counterpressure within the container will de-.

crease and finally be reduced to substantially atmospheric pressure.

The hot water tanker container may be arranged above the water level of the boiler so that after the admission of live steam of boiler pressure to said container by opening a suitable shutting olf member the water may gravitate into the boiler. .But the hot water tank or container may also be arranged at a lower level than the water level of the boiler and in this case of course even after. admitting live steam of boiler pressure the water from the container will not flow of its own accord into the boiler.

In this case according to our invention a special delivering or feeding means, for instance, a pump is arranged cap able of delivering the hot water supply within the container into'the'boiler in spite ofthe difference of level between the container and the boiler.

The invention is illustrated in the accompanying drawing in which Fig. 1 shows a locomotive PIOVlClGd'Wltll the arrangement dethat exhaust steam is available.-

scribed in which the containeris located .ata

higher level than the water level of'the boiler. Fig. 2 shows another modification in which the container is arranged at a lower levelthan the water level of the boiler. Fig. 3 finally shows an exhaust steam injector such. as used for feeding the container.

In Fig. 1 the reference numeral -1 designates a hot water tank or container .of the usual type within which hot water may be accumulated or heated, inorder to beable to feed the boiler with'water of relatively high temperature. Said hot water tank or .container may be set into communieationwiththe steam space of the boiler by means of the piping 2, a valve 3 being inserted in said piping in order to be able to shutoff the communication between the container and the boiler. A further piping 4 leads from the lower part of the container into the boiler, a

the pressure or delivery space of the injector to the container. The injector is moreover provided with a water piping 10, with a live steam nozzle 11, and with an exhaustgsteam nozzle 12.

v The hot water tankor container loan only be "fed with water heated by exhaust steam during that period of time withinwhichthe locomotive is running with-open regulator so The operation of the arrangement is the following: 7

If the hot Water tank or container has .to be supplied with water during'or immediately after the feeding of hot water from the container into the boiler such feeding has to occur against a oounterpressure which is approximately equal to thepressure Within the boiler and which in any case isgohigh that feeding of water with exhaust steam alone by means of the injector is not possible.

. Now when the valve 7 in the pipe 6 is opened live steam will flow from the container to the live steam nozzle as long as a supply of live steam is still present within the container. This current of live steam through the live steam nozzle now allows in cooperation with the exhaust steam flowing through the exhaust steam nozzle 8 the feeding of water to the container. As, however, the injector does not need any additional live steam supply through the piping 6 any longer than the presence of a high steam pressure in the con tainer will necesitate it, the arrangement described will allow a feeding of water into the container quite independently from the pressure within the same and it is also obvious that the steam that has been admitted to the container is thus utilized for feeding purposes.

In the arrangement shown in Fig. 2, 1 again desi nat-es the hot Water tank or container, 2 t e exhaust steam injector; 13 denotes a hot water pump which is driven by a steam motor 14 and which exercises a sucking action by means of the pipe 15 in the hot water container 1. Said pump will lift the hot water by means of the pipe 16 from the container and press it into the boiler.

The pipe 17 will carry the exhaust steam from the working cylinder of the locomotive to the exhaust steam injector 2. Said exhaust steam injector will draw in water from the tender through the pipe 18 and after having mixed it with the exhaust steam will press it into the pipe 19 and into the container 1. Said container 1 is also connected by means of a pipe 21 provided with a shutting off valve 20 with the live steam nozzle 11 of the exhaust steam injector 2.

Moreover a pipe 22 leads from the container 1 over a shutting off member 23 to the steam space or dome of the boiler. Whenthe valve 23 is opened the container 1 will be under boiler pressure. The steam motor 14 which drives the hot water pump 13 will operate as it is supplied with steam by means of the pipe 24 which branches ofi from the pipe 22. The exhaust steam from the small steam motor 14 may be led into the water container of the tender in order that it may not be lost, as shown in Fig. 2, and a pipe 25 is arranged for this purpose.

The operation of this arrangement is the following:

When the locomotive is running with an open regulator the exhaust steam of the locomotive will flow through the pipe 17 to the exhaust steam injector 2 and will carry water from the tender into the hot water container 1 by means of the pipe 19, said water being mixed with the exhaust steam and being thereby heated. At this moment substantially atmospheric pressure will pre vail within the water container 1. The valve 23 is closed at present. When the container 1 has been filled with hot water and if it is now necessary to feed the boiler first the valve 20 is closed and the valve 23 is opened. Thereby steam of boiler pressure is admitted to the container. The steam motor 14 is now driving the hot water pump 13 and hot water is fed from the container 1 into the boiler of the locomotive.

When the hot water supply within the container 1 is exhausted the whole volume of the hot water container 1 is filled With steam having the same pressure as the steam within the boiler. Now the valve 23 is again closed and the valve 20 is opened. The steam within the container 1 which is of the same pressure as that prevailing in the boiler is now flowing through the pipe 21 to the live steam nozzle of the exhaust steam injector 2 and water from the tender is fed into the container. Said live steam therefore will co-operate with the exhaust steam to feed the water into the container until the steam supply within the hot water container has been entirely consumed. When the hot water container has again become pressureless the exhaust steam will again operate alone to fill the container.

From the above it will also be seen that with heating arrangements having a hot water container arranged at a lower level than the water level of the boiler it is possible to utilize the quantity of live steam which has been introduced into the container and which is lost in other arrangements, provided that an exhaust steam injector forms the feeding device for the cold water.

Moreover a hot water feeding device must be provided which feeds the hot water from the container under boiler pressure into the boiler and which is capable to overcome the ing a cold water inlet and a hot water outlet,

an exhaust steam nozzle, and a live steam nozzle, the construction and arrangement of the injector being such that it will operate with exhaust steam alone or with exhaust steam and live steam simultaneously; a pipe connecting an exhaust port of the engine and the exhaust nozzle of the injector; a valved pipe connecting the uppermost portion of the storage tank and the live steam nozzle of the injector, a pipe connecting the said hot water outlet and the "hot water storage tank, and a check valve in said last mentioned pipe opening in the direction of the hot Water storage tank.

In testimony whereof they affix their signatures.

' LOUIS FRIEDMANN.

HANS DEUTSUH. 

